from "Intel Data Catalog" for 1975 https://deramp.com/downloads/mfe_archive/050-Component%20Specifications/Intel/Memory%20Components/1975_Intel_Data_Catalog.pdf Information on Intels "imm" modules and Intellec /4 and /8 products including imm8-XX "barebones" 8008 and 8080 "subsystems" Thanks to Craig Andrews in Dec 2021 who called this to my attention. - herb johnson, retrotechnology.com BAREBONES SYSTEMS page 6-48 imm8-81 Barebones 8 • Complete 8008 CPU based microcomputer subsystem composed of Intel microcomputer modules which are housed in a card cage and interconnected by a printed circuit backplane with card sockets. • Contains the following modules: * imm8-82 Central Processor Module imm6-26 PROM Memory Module imm6-28 RAM Memory Module (4K Bytes) imm8-60 I/O Module • 12 additional sockets available for optional modules. • Rack mountable chassis. imm8-85 Barebones 80 Same as 8-81 except the following modules are used:* imm8-83 Central Processor Module imm6-26 PROM Memory Module imm6-28 RAM Memory Module (4K Bytes) imm8-61 I/O Module * See page 6-47 for module descriptions. CONVERSION KITS imm4-88 The imm4-88 conversion kit provides an upgrade path for Intellec 4/MOD 4 microcomputer development systems. It includes all the hardware and software required to fully support 4040 CPU based microcomputer system development. The conversion kit contains an imm4-43 CPU module, new memory controller, new front panel, and any software required. NOTE: Due to necessary wiring changes, these conversions are done at the Intel factory. Contact local Intel salesmen or representatives for instructions. imm8-88 The imm8-88 conversion kit provides an upgrade path for Intellec@8/MOD 8 microcomputer development systems. It includes all the hardware and software products required to fully support 8080 CPU based microcomputer system development. With the imm8-88 conversion kit installed in an Intellec 8/MOD 8, complete 8080 CPU hardware and software development capability is provided. The conversion kit is installed by simply plugging in the three new hardware modules in the appropriate intellec 8/MOD 8 chassis connectors and installing the new system monitor. The system can be quickly reconfigured to support 8080 CPU chip development by replacing the original boards and system monitor. ---------------- page 6-47 Microcomputer Modules MCS-8 imm8-82 Central Processor Module • Intel's 8080-1 eight-bit parallel single chip CPU - p-channel silicon gate MOS. • Accumulator and six B-bit working registers. • Subroutine nesting up to seven levels. • Interface to 16K 8-bit bytes of PROM, ROM, or RAM via the PROM Memory Module and RAM Memory Module. • Interface for expansion to eight B-bit input ports and twenty-four 8-bit output ports, via the I/O and Output Modules. • Interrupt capability. • Two phase crystal clock. • All module interfaces are TTL compatible. imm8-60 Input/Output Module • Four a-bit input ports (32 lines). • Four B-bit data latcning output ports (32 lines). • One pair of ports for TTY communication. • All input and output ports are TTL compatible. imm8-62 Output Module • Eight 8-bit data latching output ports (64 lines). • All output ports are TTL compatible. MCS-80 imm8-83 CPU Module • Complete 8-bit parallel central processor module with system clocks, interface and control for memory, I/O ports, and real time interrupt. • Utilizes Intel's high performance 80BO single chip n-channel microcomputer. • 2.5 psecond instruction execution time. • 7B basic instructions including the entire 8008 instruction set. • Direct addressing of up to 64K bytes of any speed ROM, PROM, or RAM memory. • Unlimited subroutine nesting. • Seven working registers - six 8-bit general purpose registers and an 8-bit accumulator. • Separate 16-bit address bus, 8-bit output bus and 3 multiplexed 8-bit input busses for I/O input, memory input and interrupt data. • Direct addressing of 256 input and 256 output ports. • Multiple level real time interrupt capability. • Direct memory access capability. • All buses TTL compatible. imm8-61 I/O Module • Four 8-bit input and four 8-bit latching output ports. • . Directly compatible with imm8-83 central processor module. • Integral asynchronous serial data communications capability and teletype interface. • Jumper selectable transmission rates of 110, 1200 or 2400 baud. • Crystal controlled clock. • Capable of high speed serial communications to 9600 baud. • TTL compatible. imm8-63 Output Module • Eight B-bit latching output ports. • Directly compatible with imm8-83 central processor module. • Decoding provided for the selection of up to 256 individual output ports. • TTL compatible. COMMON SYSTEM MODULES page 6-48 imm6-26 PROM Memory Module • Provides sockets for up to sixteen 1702A electrically programmable and erasable PROMs for a system's fixed program memory (maximum 4K bytes/module). • For volume requirements, Intel 2048-bit mask programmed MOS ROMs (1302) may be substituted in the same module. imm6-28 RAM Memory Module • A 4Kx 8 n-channel MOS memory system using Intel's 1024-bit Static RAM (2102). • Address latching, data latching, and module select decoding are provided on the card. • Provides program storage for up to 4K instructions. imm6-70 Universal Prototype Module • Accomodates 14, 16, 24, or 40 pin wire wrap sockets (maximum of 52 16-pin sockets). • Provides breadboard capability for developing custom and specialized interface circuits. imm6-72 Module Extender • Extends Intellec modules out of card chassis for ease in test and system debugging. imm6-76 PROM Programmer Module • Provides all timing and level shifting circuitry for programming Intel's programmable and erasable 1702A PROMs. ------------------------ Microcomputer Modules, page 6-46 MCS-4/40 Modules may be ordered individually. All modules are 8" wide, 6.18" high and use standard 100-pin connectors. imm4-42 Central Processor Module • This is a complete microcomputer system with the processor, program storage, data storage, and I/O in a single module. • The heart of this module is Intel's 4004 single chip four-bit parallel processor - p-channel silicon gate MOS. • Accumulator and sixteen working registers (4-bit). • Subroutine nesting up to 3 levels. • For development work, the Cf1U interfaces to standard semiconductor memory elements (provided by Intel's standard memory and I/O interface set 4008/4009). • Sockets for 1K bytes of PROM (Intel 1702A PROM) are provided. • 320 words (4-bit) of data storage (Intel 4002) are provided. • Four 4-bit input ports and eight 4-bit output ports (includes TTY interface). • Busทoriented expansion of memory and I/O. • Two phase crystal clock. imm4-43 Central Processor Module • Complete microcomputer system with Intel's high performance 4040 4-bit processor, program storage, data storage, I/O and system clock in a single module. • 60 instructions including decimal arithmetic, register- to-register transfers, conditional branching, logical operations and I/O. • Interrupt capability. • Single step capability. • 24 index registers. • Subroutine nesting to 7 levels. • Direct interface capability to all standard memories (ie., TTL, NMOS, PMOS, CMOS) through Intel's 4289 Standard Memory Interface chip. • Sockets for 1 K x 8 bytes of program memory (Intel 4702A PROM) expandable to 4K x 8 using optional imm6-26 or imm4-24 modules. • 320 4-bit bytes of data storage (I ntel 4002) expandable to 2560 x 4 using optional imm4ท22 or imm4-24 modules. • Four 4-line input ports and eight 4-line output ports expandable to 16 input and 48 output ports using optional imm4-60, imm4-22 or imm4-24 modules. • Two phase crystal clock. imm4-22 Instruction/Data Storage Module • This microcomputer module has memory capacity iden- tical to the Central Processor Module and is used for expanding memory and I/O. • Sockets for 1 K bytes of PROM program storage are provided. • 320 words (4-bit) of data storage are provided. • Four 4-bit input ports and eight 4-bit output ports. imm4-24 Data Storage Module • This microcomputer module has capacity for sixteen Intel 4002 RAMS - 1280 words (4-bit) of data storage. • 320 words (4-bit) of data storage are provided. • A maximum Intellec 4 system may contain up to 2560 words of storage - decoding for this expansion is provided. • A 4-bit output port is associated with each RAM on this microcomputer module providing sixteen 4-bit output ports on each module. • All output ports are TTL compatible. imm4-60 Input/Output Module • This module provides input and output port expansion without additional memory. • Eight 4-bit input ports and eight 4-bit output ports are provided. • Ports on this module are TTL compatible. --------------------------------- INTELLEC SYSTEMS INTELLEC 4/ MOD 4 MICROCOMPUTER DEVELOPMENT SYSTEM - page 6-21 (exerpt) The Intellec 4/MOD 4 (imm 4-40A) is a complete, selfท contained microcomputer development system designed specifically to support the development and implementation of 4004 CPU based microcomputer systems. Its modular design provides the flexibility to adapt to any size user system and the resident software facilitates program development. The basic Intellec 4/MOD 4 Microcomputer Development System consists of 4 microcomputer modules (CPU, RAM, and PROM PROGRAMMER), power supplies, I/O connectors, console, and displays. The heart of the system is the imm 4-42 central processor module built around Intel's 4-bit 4004 CPU. The imm 4-42 is a complete microcomputer system containing the system clock, 1 K 8ทbit bytes of PROM memory, 320 4ทbit bytes of data RAM memory, 4 4-bit input ports and 8 4ทbit output ports. The imm 6-28 program RAM memory module contains a 4K x 8 memory array composed of Intel 2102 static random access memory elements. The imm 6-76 PROM programmer module provides the capability of programming Intel 1702A PROMs in conjunction with the front panel PROM socket and system monitor. All I/O ports are TTL compatible and accessible from the back panel 37ทpin connectors. The front panel designer's console provides a means of monitoring and controlling system operation. The Intellec modular design allows great design system flexibility. Program PROM can be expanded to 4K 8-bit bytes using imm 6-26 or imm 4-22 optional modules. Data RAM can be expanded to 2560 4-bit bytes using imm 4-24 modules. I/O capability can be expanded to 16 4-bit input and 48 4-bit output ports using optional imm 4-60 and 4-24 modules. The universal prototype card (imm 6-70) in conjunction with the eleven optional card sockets (which contain all essential system signals) provide the capability for interfacing custom designed modules. ----------------------------------- INTELLEC SYSTEMS INTELLEC 4/MOD 40 MICROCOMPUTER DEVELOPMENT SYSTEM (page 6-22 extract) (Same description as the 4/MOD 4 system except the imm-42 4004 becomes the imm-43 4040 module; a module imm-72 control module is added.) The Intellec 4/MOD 40 (imm 4-44A) The heart of the system is the imm 4-43 central processor module built around Intel's high performance 4-bit 4040 CPU. The imm 4-43 is a complete microcomputer system containing the system clock, 1 K 8-bit bytes of PROM memory, 320 4-bit bytes of data RAM memory, 3 4-bit input ports and 8 4-bit output ports. The imm 4-72 control module contains the circuitry required to interface the central processor module to the program RAM module. -------------------------- INTELLEC SYSTEMS INTELLECฎ 8/MOD 8 MICROCOMPUTER DEVELOPMENT SYSTEM (page 6-43 extract) The Intellec 8/MOD 8 (imm 8-80A) The basic Intellec 8/MOD 8 consists of seven standard microcomputer modules (CPU, RAM, PROM, I/O, PROM Programmer, Front Panel Control) and power supplies enclosed in a finished table top cabinet. The heart of the system is the imm 8-82 central processor module built around Intel's 8008 p-channel 8-bit CPU on a single chip. The Intellec 8/MOD 8 has 10K bytes of memory in its basic configuration which can be expanded to 16K bytes within the system chassis. Of the basic 10K bytes of memory, SK bytes are random access read/write memory located on two imm 6-28 RAM memory modules. This memory can be used for both data and program storage. The remaining 2K bytes of memory are located on the imm 6-26 PROM memory module and contain the Intellec 8/MOD 8 system monitor in eight Intel 1702A erasable and field programmable read only memory chips. Eight additional sockets (2K bytes) are available on the imm 6-26 for expansion. The PROM and RAM memory modules may be used in any combination to make up the 16K of directly addressable memory housed in the system chassis. Facilities are built into these modules so that combinations of RAM, ROM or PROM may be mixed in 256 byte increments. The self-contained PROM programming module allows Intel 1602A or 1702A PROMs to be programmed and verified directly from RAM or PROM memory. ----------------------- INTELLEC SYSTEMS INTELLECฎ 8/MOD 80 MICROCOMPUTER DEVELOPMENT SYSTEM (page 6-44 extract) (As above, except the imm 8-82 8008 becomes the imm 8-83 8080 CPU.) Intellec 8/MOD 80 (imm 8-84A) The heart of the system is the imm 8-83 central processor module built around Intel's 8080 high performance n-channel 8ทbit CPU on a single chip. ------------------------ Chapter 7 - Memory Systems Intel produced a series of in-XX numbered cards as RAM boards. They have a variety of bused interfaces so they could be combined into large memory arrays. Total word size and depth of memory could vary. These could "interface" with what they then called "MCS-4/ MCS-8 series micro processors". Other likely applications were for minicomputers and custom controls and industrial products.